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Re: RAID60 question

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On 12/1/24 19:19, David Christensen wrote:
> On 12/1/24 04:27, Greg wrote:
>> Hi there,
>>
>> I'm setting up MD-RAID0 on a top of HW-RAID6 devices (long story). I 
>> would like to confirm the following:
>>
>> 1. The RAID0 chunk size should be the stripe width of the
>> underlying RAID6 volumes.
>>
>> 2. The RAID0 metadata should be at the end of the device (metadata 
>> ver. 1.0).
>>
>> 3. The stride and stripe-width of the ext4 fs should be set to the 
>> once used when creating RAID6 volumes.
>>
>> Thanks in advance for any help
>> Greg
> 
> 
> I have a SOHO network and I implemented file sharing many years ago. 
> Around 2019, I switched from md to ZFS.  The learning curve has been 
> non-trivial, but I am pleased with the results and expect ZFS will be a 
> better solution going forward.
> 
> 
> Regarding data migration in general, my previous approach had been 
> in-place using one server and minimal disks (e.g. "cheap").  An operator 
> error on a prior migration resulted in loss of some archival backups. 
> So, I threw money at the problem this time around -- buy another server, 
> buy more disks, build the new server, migrate the data, make the new 
> server primary, rebuild the old server, and make the old server 
> secondary.  And, backups before, during, and after.  So, more time and 
> money, less risk, no data loss, and rebalanced data/ maximum performance 
> afterwards.

I'm familiar with ZFS. Thanks for your suggestions but I have to stick 
to RAID60 (long story, like I said). I would be grateful for an answer 
to my original question.

Regards
Greg

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RAID60 question Greg <pld@sojka.co> - 2024-12-01 13:40 +0100
  Re: RAID60 question David Christensen <dpchrist@holgerdanske.com> - 2024-12-01 19:30 +0100
    Re: RAID60 question Greg <pld@sojka.co> - 2024-12-01 20:00 +0100
    Re: RAID60 question Jeffrey Walton <noloader@gmail.com> - 2024-12-02 09:10 +0100
      Re: RAID60 question David Christensen <dpchrist@holgerdanske.com> - 2024-12-03 01:40 +0100
  Re: RAID60 question Michael Paoli <michael.paoli@berkeley.edu> - 2024-12-02 04:50 +0100

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